IV37942: UNNAMED NAMESPACE NON-UNIQUE SYMBOL NAME

March 2013 PTF for XL C/C++ for AIX, V12.1
XL C/C++ for AIX Fix Pack 4 (June 2013 PTF) for 12.1
XL C/C++ for AIX Fix Pack 5 (September 2013 PTF) for 12.1
XL C/C++ for AIX Fix Pack 7 (January 2014 PTF) for 12.1
XL C/C++ for AIX Fix Pack 8 (March 2014 PTF) for 12.1
XL C/C++ for AIX Fix Pack 11 (February 2015 PTF) for 12.1
XL C/C++ for AIX Fix Pack 12 (May 2015 PTF) for 12.1
XL C/C++ for AIX Fix Pack 13 (August 2015 Update) for 12.1
XL C/C++ for AIX Fix Pack 14 (December 2015 Update) for 12.1
XL C/C++ for AIX Fix Pack 15 (April 2016 Update) for 12.1
XL C/C++ for AIX Fix Pack 16 (July 2016 Update) for 12.1
XL C/C++ for AIX Fix Pack 17 (November 2016 Update) for 12.1
XL C/C++ for AIX Fix Pack 18 (February 2017 Update) for 12.1
XL C/C++ for AIX Fix Pack 19 (August 2017 Update) for 12.1
XL C/C++ for AIX Fix Pack 20 (March 2018 Update) for 12.1
XL C/C++ for AIX Fix Pack 6 (December 2013 PTF) for 12.1
XL C/C++ for AIX Fix Pack 9 (July 2014 PTF) for 12.1
XL C/C++ for AIX Fix Pack 10 (October 2014 PTF) for 12.1
XL C/C++ for AIX Fix Pack 21 (January 2019 Update) for 12.1

APAR status

• Closed as program error.

Error description

• Static constructor and destructor functions of classes defined
  in unnamed namespaces have their symbol names mangled using the
  name of the source file they are contained within.  If multiple
  source files have the same filename, and same class/function
  names, the generated mangled names are identical to each other.
  
  When static initialization is performed, the functions can not
  be distinguished from each other, and the first matching
  function symbol from the first object file on the link line is
  used for each static init call.
  

Local fix

• Rename source files with unique filenames.
  

Problem summary

• PROBLEM DESCRIPTION:
  Incorrect function calls from unnamed namespaces due to
  non-unique mangled function names.
  
  USERS AFFECTED:
  Users with unnamed namespaces containing static constructors
  and destructors contained in source files with the same name.
  

Problem conclusion

• The directory of the source file is now used to mangle the
  function name to distinguish between source files with the same
  name.
  

Temporary fix

Comments

APAR Information

• APAR is sysrouted FROM one or more of the following:

  IV24703

• APAR is sysrouted TO one or more of the following:

Fix information

• Fixed component name

  XL C/C++ FOR AI

• Fixed component ID

  5725C7200

Applicable component levels